How to Properly Transfer Integer Arrays Between Activities in Android Using Intent.putExtra?

Handling Array Data with Intent.putExtra

In Android, when sending complex data between activities, it is essential to consider the proper handling of arrays within intents. The following question illustrates a common issue faced when attempting to transfer array data:

Issue:

When transferring an array of integers from Activity A to Activity B using Intent.putExtra, the receiving activity retrieves the arrayB variable as '0' instead of the expected array values.

Explanation:

The issue arises because the putExtra method is used incorrectly. In such cases, you should utilize the putExtra method with the appropriate data type for the array. Attempting to retrieve an int from an array through the getInt method is incorrect.

Solution:

To correctly transfer an array using Intent.putExtra, modify the code in Activity B as follows:

<code class="java">int[] arrayB = extras.getIntArray("numbers");</code>

This change ensures that the intended array of integers is properly received and stored in the arrayB variable.

By adhering to these guidelines, you can effectively handle array data within intents, enabling seamless communication and data exchange between activities.

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